Work-support.



N0. 7ll,722. Patented 00L 2|, I902.

B. M. W. HANSON.

WORK SUPPORT.

(Apphcafiion filed Mar. 6, 1902 1 (No Model.)

112120121502: flDZH/Z ammz.

UNITED STATES PATENT OFFICE.

BENGT M. W. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT &WHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY.

WORK-SUPPORT.

SPECIFICATION forming part of Letters Patent No. 711,722, dated October21, 1902.

Application filed March 6, 1902. Serial No. 96,895. (No model.)

To all whom it may concern:

Be it known that I, BENGT M. W. HANSON, a subject of the King of Swedenand Norway, residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inWork-Supports, of which the following is a specification.

My invention relates to machinists worksupports generally, and moreparticularly to that class of those devices employed for this purpose inplaners, jigs, and tools of various kinds, drilling-machines, &c.

Heretofore screws have been employed for supporting the work, and saidscrews when adjusted by hand or otherwise frequently cause morepressure'to be used than is necessary and the work to be so sprung thatthe hole being drilled or the out being made will not be true.Furthermore, under the constant jar of the shop or machinery the screws,unless looked after adjustment by jam-nuts or otherwise, frequently turnbackward and release the work, thereby causing constant care andwatchfulness with attendant vexatious loss of time and inaccuracy ofresults. My invention is intended to overcome these disadvantages by theprovision of a device of simple construction which may be readilyadjusted and firmly secured in position and which when once set cannotgive way under pressure.

A further object of the invention is the provision of a work-supportwhich maybe readily adjusted to feel the pressure against the work, sothat all liability of springing the same may be avoided, and which afterthe adjustment has been eifected may be set firmly in position.

Afurther object of the invention is the provision of a splitwork-support movable in a socket for its reception, and in connectiontherewith a device with a point entering the slot and serving to expandsaid Work-support and cause it firmly to engage the wall of said socket.

A further object of the invention is the provision of a splitwork-support havinga head of peculiar construction adapted to bearagainst the work. I

, sition thereon.

In the accompanying drawings, Figure l is aside elevation of a planer,showing my invention applied to the bed thereof. Fig. 2 is a transversevertical section of said planerbed and of my improved work-supportinpo-Fig. 3 is a horizontal section on linear 0c of Fig. 2 looking downward.Fig.

4 is a perspective View of the improved worksupport, and Fig. 5 is aperspective View of a plug employed to expand the same.

Like characters designate similar parts throughout the several views.

Referring to the drawings, the numeral 5 designates a planer of ordinaryconstruction, to the platen 6 of which my invention may be applied, andthe numeral 7 asocket in the platen, in which the improved work-support,hereinafter described, is located. This illustration is merely given asa conventional one, for my improvement is neither limited to anyparticular machine nor to any specific art in which said machine may ormay not be employed.

Designated by the numeral 8 is theim proved work-support, shown as atube or barrel with a smooth periphery and having a longitudinal slot 8,said work-support being fitted in the socket7 and the bodyin whichsaidsocket is formed having a bore 9, the wall of which is threaded toreceive a screw 10, as shown in Figs. 2 and 8. Located in this bore andbearing against the end of said screw 10 is a plug 11, having a beveledor wedgeshaped point 11, flattened at its end to prevent turning when itenters slot 8, (said plug being known in shop parlance as the dutchman,)and adapted when the screw is adjusted to enter the slot 8 of the splitwork-support and to expand said support and cause it firmly to engagethe wall of the socket in which it is fitted. Secured to one end of thesplit worksupport by pin 12 or otherwise is a head 13, having ashank 13,through which and a wall of the work-support the pin 12 passes, asshownin Fig. 2, and this head is preferably provided with a convex orrounded top 13 which bears against one side of the work. As illustratedin the figure just mentioned, the pin 12 passes through but one wall ofthe split work-support and enters the shank 13,

whereby the barrel 8 may be expanded by the plug 11 throughout itslength to cause its entire surface to be forced against the inner wallof the socket.

In the operation of my improved work-support (and, as before stated, itis limited to no specific use) the split tube or barrel 8 is inserted ina socket 7 of the machine with which it is employed and is adjusted byhand against the work, and after this adjustment has been effected thescrew 10 is turned and causes the plug'll to expand the tube and lock itfirmly in position. When free in its socket, this tube may be readilyadjusted against the work with a feasibility of operation which will beapparent, and the operator can readily determine by the feel or touchwhen it is properly placed in position Without danger of springing thework, displacing it, or throwing it out of line, as is common with thescrew and other forms of common work-supports usually employed.

My invention is not limited to the precise details of construction shownand described nor is it limited to any specific device for expanding thework-support, and thereby locking it in place.

Having thus described my invention, What I claim is- 1. An expansiblework-support comprising a barrel havinga slot extending through one end;a head for said barrel; and means for securing the head to the barrel atsuch a point in said slotted end that it will not interfere with theexpansion of said barrel.

2. A work-support comprising a barrel slotted throughout its entirelength; a head having a shank fitted in one end of said barrel; and apin passing through the wall of the barrel opposite the slot andentering said head.

3. A work-support comprising a body having a socket; alongitudinally-slotted barrel fitted in said socket; a head having ashank secured to one side of the barrel; and means for expanding saidbarrel against the walls of the socket.

4. In a machinists work-support, the combination, with a body having asocket, of a longitudinally-slotted barrel having a smooth externalsurface freely movable within said socket to adjust it against the work;a head secured to the barrel at a point opposite the slot; and anadjustable device mounted in a bore of the body and adapted to enter theslot of said barrel, to expand the same and lock it against movement.

5. In a machinists work-support, the combination, with a bed having asocket, of a slotted barrel freely movable in said socket; anindependent plug mounted in a bore of the bed and having an end shapedto enter the slot of the barrel; and means for adj usting the plug.

6. In a machinists work-support, the combination, with a bed having asocket and a passage, of a longitudinally-slotted barrel mounted forfree movement in said socket, said barrel having a head; an independentplug mounted in the passage of the bed, and having an end shaped toenter the slot of the barrel; and means for adjusting the plug.

7. In a machinists work-support, the combination, With a bed having asocket and a passage at an angle to said socket, of a longitudinallyslotted barrel mounted in said socket; a plug having a beveled end witha flattened point, said plug being fitted in the passage of the bed; anda screw for adjusting the plug.

8. A Work-support comprising a longitudinally-slotted barrel; a headsecured to said barrel; means for securing said head in place in such aWay that it will not interfere with the expansion of the barrel; a plughaving a wedge-shaped, flattened end; and means for forcing said pluginto the slot of the barrel.

9. A work-support comprising a bed having a socket and a threaded bore;a longitudinally-slotted barrel; a head secured to one end of saidbarrel; a plug fitted in the bore and having a wedge-shaped, flattenedpoint; and a screw threaded in the bore and bearing at one end againstthe plug.

In testimony whereof I affix my signature in presence of twowitnesses.

BENGT M. W. HANSON.

Witnesses:

J. J. MASON, H. E. BAILEY.

